Table 3

Correlations of variability measures with subsequent extreme glycemic events

Metric of average glycemia and GV computed from SMBG during month 1 of studyCorrelation of metric with the number of extreme BG episodes observed during months 2–4 of study*
BG <40 mg/dLBG >400 mg/dL
HBA1c (baseline laboratory measurement)−0.040.58
Mean BG−0.150.58
SD of BG0.150.58
M-value0.160.68
MAGE0.170.56
LBGI0.59−0.06
HBGI−0.050.65
ADRR0.440.45
  • *At this sample size, correlations above 0.4 were considered significant at P = 0.001, which was an appropriate significance level accounting for the multicollinearity of the considered measures (39).